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Moving add-ons from Mac to windows

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So I unintentionally removed an add-on from my windows pc and I'm livid that my antivirus saw it as a threat. But I have the same add-on on my Mac version of Mozilla. My issue is its an old add-on now not available which is annoying since the new updates of firefox.

I'm wondering if there's a chance that I can move over the add-on and copy it to my Windows machine. I'm not sure if there's going to be a clash. And the last thing I want is to "sync" it wrong and unintentionally remove it from my Mac. Thanks

Chosen solution

Hi philipbateman59, any idea why the old extension is not available? Hopefully it wasn't removed from the Add-ons site due to a security/privacy problem.

Generally speaking, modern extensions are contained within a single file with a .xpi extension. You can find the file in your Mac Firefox's profile folder in the extensions subfolder. Since many may be named with a GUID instead of recognizable text, consult the Troubleshooting Information page to match up the ID with the title. Any of these will open that page:

  • "3-bar" menu button > "?" Help > Troubleshooting Information
  • (menu bar) Help > Troubleshooting Information
  • type or paste about:support in the address bar and press Enter/Return

Scroll down to the Extensions table to find the info.

On the receiving end, save the XPI file somewhere convenient outside of your profile, and use the Add-ons page's "gear" button to install it (Install Add-on From File).

Success?

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All Replies (4)

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Please ignore foxhelp602's post and don't call that number   -   it's a scam !

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Chosen Solution

Hi philipbateman59, any idea why the old extension is not available? Hopefully it wasn't removed from the Add-ons site due to a security/privacy problem.

Generally speaking, modern extensions are contained within a single file with a .xpi extension. You can find the file in your Mac Firefox's profile folder in the extensions subfolder. Since many may be named with a GUID instead of recognizable text, consult the Troubleshooting Information page to match up the ID with the title. Any of these will open that page:

  • "3-bar" menu button > "?" Help > Troubleshooting Information
  • (menu bar) Help > Troubleshooting Information
  • type or paste about:support in the address bar and press Enter/Return

Scroll down to the Extensions table to find the info.

On the receiving end, save the XPI file somewhere convenient outside of your profile, and use the Add-ons page's "gear" button to install it (Install Add-on From File).

Success?

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Hello,

You may have seen a post or received a notification regarding support for Firefox or Thunderbird with a link to another site or a phone number being posted. This is a scam and is not a method to receive support from Mozilla. Mozilla does not have telephone or email support. Please do not click on the link and do not interact by calling any phone numbers or email addresses listed. I apologize for any inconvenience caused. You are currently posting on the official Mozilla website and will receive assistance here.

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jscher2000 said

Hi philipbateman59, any idea why the old extension is not available? Hopefully it wasn't removed from the Add-ons site due to a security/privacy problem. Generally speaking, modern extensions are contained within a single file with a .xpi extension. You can find the file in your Mac Firefox's profile folder in the extensions subfolder. Since many may be named with a GUID instead of recognizable text, consult the Troubleshooting Information page to match up the ID with the title. Any of these will open that page:
  • "3-bar" menu button > "?" Help > Troubleshooting Information
  • (menu bar) Help > Troubleshooting Information
  • type or paste about:support in the address bar and press Enter/Return
Scroll down to the Extensions table to find the info. On the receiving end, save the XPI file somewhere convenient outside of your profile, and use the Add-ons page's "gear" button to install it (Install Add-on From File). Success?

This single piece of help has made my whole year better. I'm surprised the file formats work across mac and windows but I am so happy they do. Took a little bit to understand which folder it was meaning for mac to get things out of but I got it in the end

For anyone who needs this (for finding folders in a mac directory):

  • in the about:support webpage, there is application basics
  • The bottom field of this table is Profiles, click on about:profiles to open up your default profile
  • You need to click on the "show in finder" button for the Root Directory
     -Althernatively, follow the path of:    /Users/XXXXX/Library/Application Support/Firefox/Profiles/XXXX.default
     -- I believe to do it this way without opening firefox, you need to run a certain command to have access to open up the /Library/ folder within your user
  • As stated by jscher2000, you go to "extensions" sub-folder and you all your add-ons which most look to be gibberish.
  • Back on the about:support page, scroll down to your Extensions table and it should have all the add-ons installed on that machines version of firefox
  • if you are unsure of which add-on is the one you're looking for, go to your about:addons , the 'Extensions' side tab and from there you can manage your extensions (enabled and disabled)
  • Look and click on the add-on you want to copy, and scoll to check the version number
  • Going back to about:support you can check the extension versions and hopefully cross reference them. The final column of this table is the gibberish names found in the folder opened before.
  • As stated in the previous post, find the .xpi file, copy it and take it to the new device. Save it somewhere not in the mozilla profile (I saved it just in my C: drive in a new folder)
  • In the about:addons webpage of the second device you're installing to, click the gear on the 'Manage your Extensions' page and click Install Add-on From File...
  • Proceed to find the place you saved the .xpi file and install it from there

Again, big thanks for this community who helped and big shoutout to the user jscher2000 who is the big brain behind this. I felt it was only fair for me to help and give back and give a more step by step guide to any Mac user trying to transfer add-ons from one Mac to another or from Mac to windows.

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